JPH03101355A - Ring-back tone transmission control system - Google Patents

Abstract

PURPOSE:To give information that a callee is not absent but he is in the middle of talking by providing a generation means for a second ring-back tone which is different from a first ring-back tone that is always used and transmitting the second ring-back tone when an incoming call from a caller to the callee in a busy state, to whom call waiting service is given, is detected. CONSTITUTION:When a controller 2 detects that a subscriber B is busy when there is the incoming call from a call subscriber to the subscriber B, an incoming display tone showing that an interruption call is terminated is transmitted from a tone generator 5 to the subscriber B. Further, the ring-back tone T2 different from a normal idle state is transmitted from a tone generator 6 to the call subscriber. Thus, the call subscriber knows that the called subscriber is not absent but he is talking, and a response is expected so as to improve service.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to ring tone transmission control of a ring tone to be transmitted to a calling subscriber when a call arrives to a subscriber to whom a call waiting service is provided in a telephone exchange system. Regarding the method.

[Conventional technology]

Conventionally, when a call is received to a called subscriber to whom a call waiting service has been provided, the same ring tone is used regardless of whether the called subscriber is idle or busy with another subscriber. A ring tone is sent to the calling subscriber.

FIG. 2 is a configuration diagram illustrating the control of sending a ring tone to a calling subscriber when a call arrives to an idle called subscriber to whom a call waiting service has been provided in a conventional telephone switching system. be. In FIG. 2, a subscriber B to whom a call waiting service has been provided is connected to a channel switch 1, and a control device 8 connects a ringing trunk 7 that generates a paging signal to a subscriber B via the channel switch 1. and communication path switch 1.
The ring tone T is transmitted through the incoming trunk 3 that handles calls from other stations
A tone generator 4 that generates 1 is connected to a calling subscriber (not shown). 0 When a call arrives from a calling subscriber to subscriber B, the operation of which will be explained below, the control device 8 detects that subscriber B is free, selects the ringing trunk 7, operates the call path switch 1, and connects the subscriber. A ringing signal for ringing the bell of B's telephone is sent to subscriber B, and a ringing tone T1 indicating that subscriber B is being called is sent to the calling subscriber. When subscriber B responds,
The control bag W8 restores the ringing trunk 7 and the tone generator 4 and forms a communication path a. This allows a call between the calling subscriber and subscriber B to be made.

FIG. 3 is a configuration diagram illustrating the control of sending a ring tone to a calling subscriber when a call arrives to a called subscriber in a busy state to which a call waiting service has been provided in a conventional telephone switching system. It is. In FIG. 3, a general subscriber A and a subscriber B to whom a call waiting service is provided are connected to a call path switch 1, and a control device 8 generates a ringing tone via the call path switch 1. The tone generator 5 and the subscriber B are connected, and the ring tone T is
A tone generator 4 that generates 1 is connected to a calling subscriber (not shown). Further, another tone generator 4 is connected to the communication path switch 1, which generates a waiting tone to be sent to the subscriber A while the calling subscriber is talking with the subscriber B.
Usually, the same tone as ring tone T1 is used. 9 When a call is received from a calling subscriber to subscriber B, the control device 8 detects that subscriber B is busy and outputs an incoming tone indicating that an interrupt call has arrived. tone generator 5
to subscriber B, and to the calling subscriber,
The same ringing tone T1 as usual is sent out from the tone generator 4. When subscriber B hears the ringing tone and performs hooking, the control device 8 forms a communication path a and causes the calling subscriber to communicate with subscriber B, and also forms a communication path and connects subscriber A with Let them hear the waiting sound. And subscriber B
When the subscriber hooks up again, the call returns to subscriber A.

[Problem to be solved by the invention]

As described above, in the conventional ring tone transmission control when a call is received to a called subscriber to whom call waiting service has been provided, the ringing tone is not sent to the calling subscriber regardless of whether the called subscriber is idle or busy. Since the same ringing tone is transmitted for all calls, if the response is slow, the calling subscriber does not know whether the called subscriber is not available and does not answer, or is busy and cannot be answered.

An object of the present invention is to be able to notify the calling subscriber that the called subscriber is not away but busy when a call arrives to the called subscriber to whom call waiting service has been provided. An object of the present invention is to provide a ring tone transmission control method that can improve the service provided to customers.

[Means to solve the problem]

The ringing tone transmission IIIw method of the present invention provides a telephone switching system equipped with a first generating means for generating a first ringing tone, and a second ringing tone.
a second generating means for generating a ringing tone; when an incoming call is detected from a calling party to a called party to whom call waiting service has been granted, a second generating means is provided for generating a ringing tone; the first ring tone when the called party is free;
The second ring tone is selectively transmitted to the caller when the caller is busy.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings. The operation when subscriber B is in an idle state is the same as that described in the conventional example.

FIG. 1 is a block diagram of a telephone exchange system for explaining one embodiment of the present invention. In FIG. 1, a general subscriber A and a subscriber B to whom call waiting service is provided are connected to a call path switch 1, and a control device 2
connects the tone generator 5 that generates the ringing tone and the subscriber B via the channel switch 1, and also connects the tone generator 6 that generates the ringing tone T2 and the subscriber B via the channel switch 1 and the incoming trunk 3. A subscriber (not shown) is connected to the subscriber (not shown). Furthermore, another tone generator 4 that generates a waiting tone to be sent to subscriber A while the calling subscriber is talking with subscriber B is connected to the communication path switch 1, and is the same as the normally used ringing tone T1. sound is used. When a call is received from a calling subscriber to subscriber B, the operation of which will be explained below, when the control device 2 detects that subscriber B is busy, the control device 2 sets an incoming call tone to indicate that an interrupt call has arrived. generator 5
to subscriber B, and to the calling subscriber,
A ring tone T2 different from that in a normal idle state is sent out from a tone generator 6. This allows the calling subscriber to know that the called subscriber is not at home, but is busy, and can expect a response, thereby improving service. Then, when subscriber B hears the ringtone and performs hooking, the control device W2 forms a communication path a and causes the calling subscriber to communicate with subscriber B. Let A hear the waiting sound.

Then, when subscriber B hooks up again, the call returns to subscriber A.

In this embodiment, a case has been described in which the calling subscriber is accommodated in another station, but even if the calling subscriber is accommodated in the same station, the same structure can be used through means for connecting the calling party and the called party.

〔Effect of the invention〕

As explained above, the present invention provides means for generating a second ring tone different from the first ring tone normally used in a telephone exchange system, and provides a means for generating a second ring tone that is different from the first ring tone normally used in a telephone exchange system, so that a called person in a busy state who is provided with a call waiting service When an incoming call from a calling party is detected, a second ring tone may be sent to notify the calling party that the called party is not away and is busy. This has the effect of improving service to calling subscribers.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a telephone switching system for explaining an embodiment of the present invention, and FIGS. 2 and 3 show incoming calls to a subscriber to whom a call waiting service is provided in a conventional telephone switching system. FIG. 2 is a configuration diagram for explaining ring tone transmission control of a ring tone that is sometimes transmitted to a calling subscriber. 1...Call path switch, 2.8...--Control device, 3''° turn-on trunk, 4, 5.6...
...Tone generator, 7...Ringing trunk.

Claims (1)

[Claims] A telephone exchange system equipped with a first generating means for generating a first ringing tone is provided with a second generating means for generating a second ringing tone, and a call is made to a called party to which a call waiting service is provided. If an incoming call from a person is detected, identifying the state of the called party and selectively providing the first ring tone when the called party is free and the second ring tone when the called party is busy; 1. A ringing tone transmission control method, characterized in that a ringing tone is transmitted to the calling party.